Duplicating apparatus.



No. 809,287. PATENTED JAN. 9, 1906.

' A. B. DICK.

DUPLICATING APPARATUS.

APPLICATION FLED PREA, 1905.

2 SHEETS-SHEET 1.

ATTORNEY PATENTED JAN. 9', 1906.

A. B. DICK. l DUPLIGATING APPARATUS.

APPLICATION FILED PEB. 4, 1905.

z MEETS-SHEET z,v

FA A

WITNESSES by two bars b.

UNITED STATES PATENT oiTIoE.

ALBERT B. DICK, LAKE FOREST, ILLINOIS, ASSIGNOR TO A. B. DICK COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

DUPLICATING APPARATUS. y

Specification of Letters Patent.

Patented'aan. 9, 1906.

Application filed February 4, 1905. Serial No. 244,138.

To @ZZ whom t may concern:

Be '1t known that I, ALBERT B. DICK, a citizen of the United States, residing at Lake Forest, in the county of Lake and State of Illinois, have invented acertain new and useful Improvement in Duplicating Apparatus, (Case A,) of which the following is a specification. i

The invention is designed particularly for use in the duplication of autographic and typewritten matter by means of astencil mounted upon a drum. The object is tov provide a simple, compact, and durable apparatus eliicient and reliable in operation.

In carrying out the invention in the preferred form, which will be hereinafter described, I employ a drum upon the surface whereof the stencil-sheet is secured. Underlying and coacting with this drum is a pressure-roller spring-pressed toward the drum., but provided with means whereby the same may be withdrawn therefrom. Means are also provided whereby the pressure-roller is permitted to assume operative position (exerting pressure against the stencil-covered portion of the drum) during a certain portion of the movement of the latter, and whereby such roller will be thrown to inoperative position during the remainder of the movement of the drum, such means including a lock', operated, preferably, by the drum, to secure the pressure-roller temporarily in such inoperative position, but to release the same to permit its operative position when needed for the printing operation.

In the drawings, Figure 1 is a central longitudinal section of a duplicating machine embodying my improvement, illustrating the locking device above referred to in operative position and after the printing movement of the drum. Fig. 2 a detail view illustrating the locking device in inoperative position just before the printing movement of the drum; and Fig. 3 is a section on the line 3 3, certain parts being broken away to benefit the eX- planation.

Referring to these drawings, in which similar letters denote corresponding parts, it will be seen that the frame comprises,'mainly, the

vtwo side plates A A', provided with upwardlyextending bracketsa, in which are journaled the stub-shafts supporting the stencil-carrying drum. Said drum comprises two heads B B', and these are here shown as connected l designates the stencil-carrier of foraminated material, the ends thereof terminating at the cross-bars I). The stencil-carrier is preferably provided with a detachable ink-pad b2, over which is secured the stencil-sheet 63.

C designates a shelf-plate extending from one to the other of the drumheads and provided with angular upturned ends c, whereby the same is secured (by riveting or other means) to such heads.

D designates a locking-plate overlying the shelf-plate C and here shown as securedv by means of the angular downturned ends CZ to the angular upturned ends c ofVV said shelfplate.

E designates astop-plate, here shown as provided with angular upturned ends e, whereby the same is secured to the drum-heads B B', If desired, instead of mounting said plate E rigidly as here shown the same may be hinged, so as to lie close to the plate Dafter the stencil-sheet has been placed in position. This may be accomplished by omitting` the rivet at each end of the plate nearest to the forward edge of the stencil-carrier or in any other suitable manner. Projecting rearwardly from said stop-plate are angular inturned stops e.

The stencil-sheet 53 may comprise either a waxed sheet alone or such a sheet combined with another sheet or other sheets-as, for instance, a backing-sheet or a type-protecting sheet, or both. To secure such a stencil-sheet to the drum above described, it is necessary only to fold the forward end thereof upon itself, as illustrated in Fig. l, and then to pass such forward end, the folded edge in advance, between the shelf-plate C and locking-plate D. The stops e limit the degree of movement in this direction. If then the stencilsheet be again drawn forwardly, the fold b* thereof will spring upwardly on the outer side of said locking-plate D and between the same and the stop-plate E, thereby properly positioning the sheet and securing the forward end thereof to the drum. The sheet may now be passed around the periphery of the drum upon the stencil-carrier b and the rearward end thereof secured in any suitable manner-as, for instance, by means of the bail 6".

' F designates a stencil-protecting plate, (best seen in Fig. 3,) the function whereof is to pro.- tect the stencil-sheet on the pick-up line-2l. e., the point at which contact is made with the pressure-roller hereinafter to be described.

IOO

IIO

Said plate is preferably of thin metal, its forward edge coacting with screws f, secured to the drumheads or to the stencil-carrier thereon, its rearward edge being' secured in position by means of latches f', pivoted at f2 upon the stop-plate E. As will readily be seen, in order to remove the plate from the position in which it is shown in Fig. 3 it is only necessary to throw the latches f to inoperative position and to lift the plate backwardly and upwardly to free the same from the screws f.

Gr G designate wings, here shown as secured to and extending inwardly from the inner faces of the drumheads B B. The function of these wings is to aid in maintaining the impression-sheets level as against the tendency of either the lateral or longitudinal edges thereof (or both) to curl. Said wings assist materially in permitting the sheets to be passed to the paper-stop, presently to be described, and by which such sheets are properly positioned in advance of the printing operation.

The paper stopping and stripping mechanism is here shown as comprising a rock-bar H, journaled in the side members A A of the frame and provided with forwardly-projecting vpaper stopping and stripping' fingers Zt. Said rock-bar and lingers are operated by means of the rocking lever L, pivoted at /2 and provided with sheave it, lying in the path of movement of a cam Ztl, secured to or formed integral with the drumhead B.

I designates the pressure-roller, here shown as journaled at its ends in arms Z, hinged at e" to the inner faces of the side members A A of the frame. The free ends ofsaid arms, with which coact coil-springs t, are downturned at Z2 and curved for coaction with cams 3, mounted upon rock-shaft vl", journaled also inthe side members of the frame and provided outside such frame with the fingerpiece t. As will be seen, the operation of said finger-piece in one direction and consequent operation of the cams Z will depress the arms t', and therefore the pressure-roller I, throwing the same out of operative relation to the stencil-carrying drum.

J J designate sheaves carried by the hinged arms t', one of these lying in the path of movement of the cam /t'1 on the drumhead B and the other lying in the path of movement of a similar cam it, secured to or formed integral with the other drumhead B. As will be seen, whenever the drum is turned to the point where said cams Ztl and 7a2 are brought into coaction with the sheaves .I the latter are depressed, thereby effecting also the depression of the pressure-roller I to inoperative position out of contact with the drum.

L L designate locking-levers, each of which is pivoted at Z to the exterior of a hinged supporting-arm t' and between such arm and the inner surface of the side plates A A of the frame. Each lever extends downward and forward from such pivotal point and terminates in a curved toe Z', adapted to coact with the rock-shaft t" by passsing under the same, as shown in Fig. l, when the roller I is ldepressed. Each lever also extends upwardly from such pivotal point, as shown at Z2, into the path of travel of a lock-operating stop or lug Z3, formed on the external face of one of the drumheads.

In the present instance a stencil-carrying drum has been shown which is of the oscillating type rather than of the rotary type-e'. e., the movement thereof is not a continuous rotary movement, but in one direction to a point of arrest and then in reverse direction to a similar point. The degree of movement of said drum may be determined by the coaction between the stops Z3 and the extensions Z2 of the locks L, and such coaction operates, additionally, to lock the pressure-'roller I out of engagement with the periphery of the drum and to release the same for coaction with the stencil-covered portion thereof.

In operation the pressure-roller-carrying arms are freed from the restraint of the cams They are held downward, however, by the coaction of the cams Zi* /t with the sheaves J, thereby maintaining an open space between the periphery of the pressure-roller I and the drum. One of the pile of impression-sheets laid upon the feed-board M is then fed forward between the guides m until its forward edge makes contact with the paper-stop. The drum is now turned in the direction indicated by the arrow, Fig. 2, and the cams if pass out of coaction with the sheaves J just in advance of the moment of coaction between the stencil-sheet and the pressure-roller. The latter is thereupon permitted to rise, so as to exert upward pressure upon the impressionsheet, thereby assuring iirm contact of the latter with the stencil-covered periphery of the drum. This Contact is maintained during the entire period of coaction of the drum and pressure-roller and until the cams Zt* /1/5 again come into coaction with the sheavesJ, this signalizing the passage of the end of the stencil-sheet. At this point said cams again depress the pressure-roller I, and immediately thereafter (see Fig. l) the lock-operating stops or lugs Z3 make contact with the extensions Z2 of the locks L, thereby rocking said locks upon their pivotal points Z and bringing the curved toes Zl thereof under the rock-shaft Z". This locks the pressure-roller in its lowermost position (and out of contact with the periphery of the drum) and maintains the same inoperative until the drum has again been returned in the opposite direction to the starting-point, whereupon contact of the stops or studsZ3 with the extensions Z2 (on the opposite side of the latter) will again rock the locks L and free the same from contact with the rock-shaft e, whereupon the operation may be repeated as before. It will of course be un- IOO IIO

IIS

derstood that as the stencil-covered portion of the periphery of the drum coacts with the pressure-roller the sheet is imprinted upon and fed outward from the machine, the paper stops and strippers being depressed to permit this at the moment when the forward end h6 of the cam passes out of engagement with the sheave its upon the rocking lever la.

Having now described my invention, what I claim as new therein, and desire to secure by Letters Patent, is as follows:

1. In duplicating apparatus, the combination with a movable drum and an underlying pressure-roller, of means carried by said drum for iattening an impression-sheetin advance of the passage of the same between said drum and roller, substantially as set forth.

2. In duplicating apparatus, the combination with a movable drum and an underlying pressure-roller, of members mounted within the drum, at that point not covered by the stencil-sheet thereon, for coacting with an impression-sheet in advance of the passage of the same between said drum and roller, substantially as set forth.

3. In duplicating apparatus, the combination with a movable drum and an underlying pressure-roller, of means for passing an impression-sheet between said drum and roller and wings carried by said drum and extending adjacent to the path of such impressionsheet, substantially as set forth.

4. In duplicating apparatus, the combination with a movable drum comprising heads and a stencil-carrier, of wings extending inwardly from the inner faces of said drumheads and adapted to coact with a sheet in advance of the passage thereof between said drum and roller, substantially as set forth.

5. In duplicating apparatus, the combination with a movable drum, vof an underlying pressure-roller movable to operative and inoperative positions relatively to said drum, a lock positively coacting with said roller and means operated by said drum for actuating said lock to hold said roller in inoperative position, substantially as set forth.

6. In duplicating apparatus, the combination with a movable drum and an underlying pressure-roller movable to operative and inoperative relation to said drum, of means carried by the drum for moving said roller to inoperative position, and a lock operated by said drum for maintaining said roller in such position, substantially as set forth.

7. In duplicating apparatus, the combination with a drum and an underlying pressureroller mounted on swinging arms and movable to operative and inoperative relation to said drum, of a lock for maintaining said pressureroller in inoperative position said lock including a lever mounted upon one of said arms, and means carried by said drum for moving said lever to locking and unlocking positions, substantially as set forth.

8. In duplicating apparatus, the combination with a movable drum and an underlying pressure-roller mounted upon hinged arms, of a cam carried by said drum and operating to throw said pressure-roller to inoperative position, a locking device for said pressureroller, and means carried by said drum for operatlng said locking device, substantially as set fort 9.v In duplicating apparatus, the combination with a movable drum, of an underlying pressure-roller movable to operative and inoperative relation to said drum, means carried by said drum for moving said roller to inoperative position, and a lock for said pressureroller having a member projecting into the line of travel of a projection upon said drum, substantially as set forth.

10. In duplicating apparatus, the combination with a movable drum, of an underlying pressure roller mounted in hinged arms spring-pressed toward said drum,- mechanism intermediate of said roller and drum for depressing the former, locking-levers carried by said hinged arms and adapted to lock said pressure-roller in inoperative position, and means carried by said drum for operating said levers, substantially as set forth.

11. In duplicating apparatus, the combination with a drum and a stencil and an attaching device carried thereby, of a stencil-protecting plate detachably secured to said drum independently of said device, said plate coacting with said stencil, substantially as set forth.

12. In duplicating apparatus, the combinaz tion with a drum and a stencil-attaching device carried thereby, of a detachable stencilprotecting plate independent of said device, and means carried by said drum and coacting with said plate at either edge thereof to maintain said plate in position, substantially as set forth.

13. In duplicating apparatus, the combination with a drum and a stencil-attaching device carried thereby, of a detachable stencilprotecting plate independent of said device, and latches carried by said drum for securing said plate in position, substantially as set forth.

This specification signed and witnessed this 30th day of January, 1905.

ALBERT B. DICK.

IOO

IIO 

